A nurse is preparing to administer phytonadione 0.5 mg IM to a newborn.Available in phytonadione injection 1 mg/0.5 mL. How many mL should the nurse plan to administer?
(Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.25"]
Amount of injection in mls = Dose ordered (mg) / Dose available Therefore:
Amount of injection in mls = 0.5 mg Therefore;
Amount of injection in mls = 0.5 mg x 0.5 mL / 1 mg Amount of injection in mls = 0.25 mL
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
Dosage (mL) = Ordered dose (mg) / Available dose (mg/mL) Therefore;
Dosage = 150 mg / 150 mg/mL Dosage = 1 mL
Therefore, the nurse should administer 1 mL of medroxyprogesterone solution for injection to the client.
Correct Answer is ["2.9"]
Explanation
Let’s calculate the IV pump rate for administering dobutamine to a preterm newborn.
Step 1 is to convert the dose from mcg/kg/min to mg/kg/min. We know that 1 mg = 1000 mcg, so we have:
12 mcg/kg/min ÷ 1000 = 0.012 mg/kg/min
Step 2 is to calculate the total amount of dobutamine the newborn needs per minute:
0.012 mg/kg/min × 2 kg = 0.024 mg/min
Step 3 is to convert this to an hourly rate:
0.024 mg/min × 60 min/hr = 1.44 mg/hr
Step 4 is to calculate the volume of the solution that contains this amount of dobutamine. We know that 250 mg of dobutamine is dissolved in 500 mL of solution, so:
(1.44 mg/hr ÷ 250 mg) × 500 mL = 2.88 mL/hr
So, the nurse should set the IV pump to deliver approximately 2.9 mL/hr (rounded to the nearest tenth).
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